The spelling of the word "ilxx" is a bit tricky. It is pronounced as /ɪlksks/. The first two letters "il" are pronounced as "ill" with a short "i" sound. The next two letters "xx" are pronounced as a voiceless fricative sound. The first "x" is pronounced as /ks/ and the second "x" is pronounced as /s/. In summary, the word is pronounced as "ill-ksks" and its spelling is not reflective of its pronunciation.